dowson



(No Model.)

J." E. DowsoN. l APPARATUS POR THE MANUPAGTURE 0F GAS. No??l ,107.

Patented May 22,1883.

ATTORNEYS.

N. PETERS. Phmmmgnpm wmmgm. n. c

UNITED STATESA PATENT OFFICE.

JOSEPH DOwsON, OE WEsrMINsTEn, LONDON, ENGLAND.`

APPARATUS FOR THE MANUFACTURE OF GAS.

SPECIFICATION forming part of Letters Patent No. 278,107, dated May 22, 1883.

Application tiled January 30,1883. (No model.) Patented in England June 3G, 1881, No. 2.85.9 in France December 30, 1881, No. 146,609; in Spain February, 1882; in Belgium February 17, 1882, No. 57,107; in ItalyMarch 3l, 1882, No. 13,898, and in Austria September 22, 1882, No. 25,095.

To all whom it may concern Be it known that I,JOsEI IIEMERsON Dow sON,'of Westminster, London,-England, have invented certain new and useful Improvements in Apparatus for the Manufacture and Treatment of Gas, of which the following is a full, clear, and exact description.

This invention relates to improvements in the manufacture and treatment; of non-luminous heating-gas made by passing steam and air, or steam only, through incandescent carbonaceous fuel, and the improvements chiefly refer to apparatus for makingsuch gas; but sme of them may be usedfor other purposes a S0.

The accompanying drawings are intended to illustrate practical modes of carrying the invention into effect;` but the precise forms and details of construction may be varied without departing from the general nature of the invention.

Figure 1 is a part elevation and part sectional view of a gas-generator and steam-superheater, and Fig. 2 is a plan view of the superheater. Fig. 3 is another part elevation and part sectional view of thegas-generator shown in Fig. 1. Fig. 4 is a vertical Section ot' a gas-generator with a grate formed of bollow tubes.

The gas-generator shown in Figs. 1 and 3 consists of a metal casing, 1, cylindrical or otherwise, with a lining, 2, of ganister or other refractory materiala circular swing-grate, 3, with broad hinge and holding-np pin, a closed ash-box, 4, provided with a suitable door, 5 an air-induction pipe, 6, a steam-injector, 7, steam-pipe 9, leading to injector 7, a top or cover, 10, provided with astoke-hole and cap, l1', a feedingtube,12,`with loose faced lid, a valve, 14, with weighted lever to regulate the admission of fuel, a gasoutlet, 15, with cleaning-door 16, a chimney or Waste pipe, 17, with suitable valve or cock, 18, a down-pipe, 19, with suitable valve or cock, 20, and asiphon or cleaning-box, 21, with outlet leading to gas-holder.

The steam produceror superheater shown in Figs. 1 and 2 consists of a zigzag coil of pipe, 22, a gas-burner, 23, a pipe, 24, to convey gas from the gas-holder to the burner 23,

a grate, 25to receive a tire when there is no gas available for heating the coil, a door, 26, a pipe, 27, to convey water or steam into the coil 22, a pressure-gage, 2S, a steam-cock, 29, a casing, 30, ot' brick-work or other suitable material, made solid, as shown on drawings, or

' made hollow, if preferred, to receive water to be heated before passing into the coil, a chimney-pipe, 31. The tubular boiler or superheater is used for producing steam to bc def composed in the gas generator or retort.

The gas-generator shown in Fig. 4 is similar to the generator shown in Figs. 1 .and 3, eX- cept that it is provided with a hollow tubular grate, 36, in which steam is produced by the heat derived from the tire resting on the tubes. The top or cover and the littngs attached to it are similar to those shown in Figs. 1 and 3, or may be of any other convenient form. It will be seen that in this case the tubular grate takes the place of and dispenses with the separate steam producer and superheater shown in Figs. 1 and 2. The grate 36 can be made of hollow bars attached to' a cross-tubeat each end, and in a variety of other ways.

In some cases it may be desirable to produce the steam in a separate apparatus, and then ordinary tire-bars or any other suitable kind of grate may be substituted for the tubular grate 36. The grate may be made in halves, each halt' bein g supported by two spindles resting on bearings and heldup on the oppo site sides by pins.

The injector 7 consists of a hollow sphere provided with a nozzle, 40, for the outlet ot' steam, and a pin, 41, ,passing through a stuffing-box for the purpose of clearing the nozzle of obstructions. It .has also a blow-oft' cock, 45. The nozzle is set Opposite'the air-indueA `tion pipe 6, and is held in position by a vertical support attached to the end of thcpipe 6, this support carrying a horizontal piece, 43, which has a hole at one end, and an eye with `a set-screw, 44, at the other. The eye is slipped over the steam-pipe 9, and is held lirmly by the set-screw. The piece 43 is passed over the upper end of the vertical support, and is se cured by a nut. The end ofthe pipe 6 may be provided with a movable cap, nozzle, or other jectors and two air-pipes.

suitable contrivance for regulating the quantity of air to be admitted or to exclude air altogether.

In some cases it is desirable to use two in- One injector would then be placed over the other, and in order that, when required, the lower one shall not pass steam and the air-pipe opposite to it shall not allow any escape outward from the generator, this air-pipe may be furnished with a movable disk which can be placed over the end of the pipe between it and the nozzle of the injector. A loose nut or covering-piece of tube which has been previously screwed ontoA J the nozzle can then be unscrewed until it binds against the before-mentioned disk and causes the latter to be lirmly fixed.

The gases resulting from the decomposition of steam passed throughincandescent carbonaceous fuel, with or without air, have very little smell when the sulphureted hydrogen has been removed in the purifier; and when such gases are used, and it is desirable to detect any escapes or leaks, I pass such gases, having little or no smell, through one or more layers of naphthaline sublimed or otherwise suitably prepared, in order to give such gases an additional smell, and for this purpose I eX- pose naphthaline in or on perforated trays or cells in a gas-tight vessel, and allow the gas to pass over until it is sufiiciently impregnated with naphthaline.

Having thus fully described my invent-ion,I

claim as new and desire to secure by Letters Patentl. In a gas-generator, the combination,with a casing, 1 2, provided with a grate in its bottom, and a feed-tube having a weighted valve, and a chimney with a valve in its top, of gasoutlet 15, provided with the cleaning-door 16, the down-pipe 19, provided With the valve 20, and the cleauing-box 2l, substantially as herein shown and described.

2.' In a gas-generator,the combination,with the casing 1, provided with the air-induction pipe 6, of the injector 7,.the steam-pipe 9, the support 43, and set-screw ll'su'bstantially as herein shown and described.

3. In a gas-generator, the combination, with the casing 1 2, provided with the inductionpipe 6, and the injector 7 of the tubular grate 36 and the steam-pipe 9, leading from the grat-e to the injector, ,substantially as herein shown and described.

The above speciication of my new and iui proved apparatus for the manufacture and treatment ot' gas signed by me this 9th day ot' November, 1882.

JOSEPH EMERSON DO\VSON.

Witnesses:

I. H. Davis, Draftsman, 3 Great Queen Street, Westminster.

LoUIs PEARCE, Olmi-,3 Great Queen Street, llfestmfnster. 

